iRequiem gained a cool bag full of updates including Apple Game Center support and jumping. Here is more info:

The update brings Apple's Game Center support. Now players have an option to choose between Game Center and OpenFeint (or even use both) as the social gaming platform. This means that players can see how their scores rank against their friends, as well as other players around the world. Also, they can unlock achievements and compare them with others. Until this update all these features (leaderboards and achievements) were available through OpenFeint.

Besides this new feature, there is also jumping added to the game. Now you can avoid enemy bullets or jump over your enemies. There is a power jump, which will repulse your opponents and make damage to them, and it's an easy way to make extreme overkills with power jumping on your enemies a few times.